Roman pits?

You can't believe everything you see in paintings or drawing, no matter how old the drawings are. Like, there are painting of unicorns.

This is suppose to be of a fight between an elephant, a lion, and a dog.

Dead elephant? Really? Perhaps it was to illustrate a symbolic fight between groups whose symbols these animals were?

A more realistic fight between dog pack and lion, would show dead dogs.

Note, that like bulldogs (not so much always pit bulls) the dogs are going for the lion's nose, even though that would not be the smartest place to grab.

The lion is not petting the bulldog with his right paw.